Notice staff's publicity officer (5)
I believe the answer is:
adman
'publicity officer' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'notice staff's' is the wordplay.
'notice' becomes 'ad' (short for advert).
'staff' becomes 'man' (as in staffing or manning a particular place).
'ad'+'man'='ADMAN'
Can you help me to learn more?
(Other definitions for adman that I've seen before include "Worker in commercials" , "Someone involved in commercial promotion" , "Commercials writer" , "Commercial publicist" , "persuasive type" .)